<script setup>
import {User, Lock} from '@element-plus/icons-vue'
import {onMounted, ref} from 'vue'
import {ElMessage} from 'element-plus'

const STORAGE_KEY = 'userAuth'; // 存储键名
//控制注册与登录表单的显示，默认显示注册
const isRegister = ref(false)
const rememberMe = ref(false); // 记住我状态

//定义数据模型
const registerData = ref({
    username: '',
    password: '',
    rePassword: ''
})

//校验密码的函数
const checkRePassword = (rule, value, callback) => {
    if (value === '') {
        callback(new Error('请再次确认密码'))
    } else if (value !== registerData.value.password) {
        callback(new Error('请确保两次输入的密码一样'))
    } else {
        callback()
    }
}

//定义表单校验规则
const rules = {
    username: [
        {required: true, message: '请输入用户名', trigger: 'blur'},
        {min: 5, max: 16, message: '长度为5~16位非空字符', trigger: 'blur'}
    ],
    password: [
        {required: true, message: '请输入密码', trigger: 'blur'},
        {min: 5, max: 16, message: '长度为5~16位非空字符', trigger: 'blur'}
    ],
    rePassword: [
        {validator: checkRePassword, trigger: 'blur'}
    ]
}

//调用后台接口完成注册
import {userRegisterService, userLoginService} from '@/api/user.js'

const register = async () => {
    //registerData是一个响应式对象，如果要获取值，需要.value

    let result = await userRegisterService(registerData.value);
    /*    if (result.code === 0) {
            //成功
            alert(result.msg ? result.msg : '注册成功');
        } else {
            //失败
            alert('注册失败');
        }*/
    // alert(result.msg ? result.msg : '注册成功');
    ElMessage.success(result.msg ? result.msg : '注册成功')
    localStorage.removeItem(STORAGE_KEY); // 注册成功后清除存储
}

//绑定数据，复用注册表单的数据模型
//表单数据校验
//登录函数
import {useTokenStore} from "@/stores/token.js";
import {useRouter} from "vue-router";

const router = useRouter()

const tokenStore = useTokenStore();
const login = async () => {
    //调用接口完成登录
    let result = await userLoginService(registerData.value);
    /*    if (result.code === 0) {
            alert(result.msg ? result.msg : '登录成功');
        } else {
            alert('登录失败');
        }*/
    // alert(result.msg ? result.msg : '登录成功');
    if (result.code === 0) {
        // 存储记住我状态和用户名
        if (rememberMe.value) {
            localStorage.setItem(STORAGE_KEY, JSON.stringify({
                rememberMe: true,
                username: registerData.value.username
            }));
        } else {
            localStorage.removeItem(STORAGE_KEY);
        }

        tokenStore.setToken(result.data);
        await router.push('/');
        ElMessage.success(result.msg || '登录成功');
    } else {
        // 处理登录失败的情况，显示错误消息
        ElMessage.error(result.msg || '登录失败');
    }

    //把得到的token存储到pinia中
    tokenStore.setToken(result.data)
    //跳转到首页，路由完成跳转
    await router.push('/')
}

// 页面加载时读取存储数据
onMounted(() => {
    const storageData = localStorage.getItem(STORAGE_KEY);
    if (storageData) {
        const data = JSON.parse(storageData);
        rememberMe.value = data.rememberMe;
        registerData.value.username = data.username;
    }
});

</script>

<template>
    <el-row class="login-page">
        <el-col :span="15" class="bg"></el-col>
        <el-col :span="6" :offset="1" class="form">
            <!-- 注册表单 -->
            <el-form ref="form" size="large" autocomplete="off" v-if="isRegister" :model="registerData" :rules="rules">
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名"
                              v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码"
                              v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item prop="rePassword">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入再次密码"
                              v-model="registerData.rePassword"></el-input>
                </el-form-item>
                <!-- 注册按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="register">
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = false">
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>
            <!-- 登录表单 -->
            <el-form ref="form" size="large" autocomplete="off" v-else
                     :model="registerData" :rules="rules"
                     @keydown.enter="login"> <!-- 添加键盘事件监听器 -->
                <el-form-item>
                    <h1>登录</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名"
                              v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码"
                              v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item class="flex">
                    <div class="flex">
                        <el-checkbox v-model="rememberMe">记住我</el-checkbox>
<!--                        <el-link type="primary" :underline="false">忘记密码？</el-link>-->
                    </div>
                </el-form-item>
                <!-- 登录按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = true">
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<style lang="scss" scoped>
/* 样式 */
.login-page {
  height: 100vh;
  background-color: #fff;

  .bg {
    position: relative; /* 添加定位以便伪元素定位 */
    background: url('@/assets/logo2.png') no-repeat left top / 300px auto,
    url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
    padding: 20px; /* 增加 padding 留出边框 */

    /* 添加伪元素实现渐变覆盖 */
    &::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(to left, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0) 50%); /* 渐变从左边不透明到右边透明 */
      pointer-events: none; /* 确保伪元素不影响点击事件 */
      z-index: 1; /* 确保伪元素在背景图上方 */
    }
  }


  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;

    .title {
      margin: 0 auto;
    }

    .button {
      width: 100%;
    }

    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>